Question about servo for the Mad Rat

[damselfly]

Hi Guys,

As most of you already know, I bought myself an rtr Mad Rat. I've decided to keep this stock and let my Daughter use it, as she's shown a keen interest to driving it, albeit erratically. She's only 4 and calls it the Mousey car lol. :-D

Anyway, the rtr car came bundled with assembly instructions which seem easy and straightforward. This has now spurred me on to getting myself the £50 kit.

Now, my question is; Will ANY servo fit into this, or do servos come in various sizes? If I need a specific size servo, would somebody be so kind as to tell me which I should opt for?

Also, does anybody have the part # for the stock rtr servo, as the assembly instructions dont quote it.

Many thanks as always,

Damian